| 1 Nygård AS | | 2023 |
| Aarli AS | Construction | 2018 |
| Agder Antirust AS | Other services | 2012 |
| Agder Betongsaging AS | Construction | 2005 |
| Agder Forsikring Og Pensjon AS | | 2020 |
| Agder Kjemi AS | Wholesale & retail | 2023 |
| Agder Maskinstasjon AS | Construction | 2026 |
| Agder Miljø AS | Construction | 2014 |
| Agder Stein & Grunnarbeid AS | Mining & quarrying | 2011 |
| Agder Supply AS | Wholesale & retail | 1986 |
| Agderparken BN2 Tomt 3 AS | Real estate | 2023 |
| Altmauli AS | Professional & scientific | 2025 |
| Andreassen & Aastveit AS | Construction | 1988 |
| Andreassen & Aastveit Eiendom AS | Real estate | 2009 |
| Anlegg & Eiendom AS | Construction | 2017 |
| Applied Cost Cut AS | Professional & scientific | 1999 |
| Arendal Lufthavn Gullknapp AS | Transport & logistics | 1984 |
| Arendals Fossekompani ASA | Energy | 1896 |
| Arendalske AS | Wholesale & retail | 2021 |
| Arilds Eiendom AS | Real estate | 1988 |
| Arilds Invest AS | | 2025 |
| Arilds Motorsenter AS | Wholesale & retail | 2007 |
| Arnfinn Nygård Eiendom AS | Real estate | 2006 |
| AS Niva | Real estate | 1988 |
| Atle Monrad Consulting AS | Information & communication | 2018 |
| Audun Olsen Invest AS | | 2020 |
| Auto Centeret Froland AS | Other services | 2012 |
| Autohobby AS | Wholesale & retail | 2021 |
| Ba-Lighting AS | Wholesale & retail | 2014 |
| Bara Holding AS | Wholesale & retail | 2020 |
| Bestefar Knut Bøylestad Eiendom AS | | 2025 |
| Betongskjæring Sør AS | Construction | 2015 |
| BH Tomt 5 AS | Real estate | 2015 |
| Bikable.No | Wholesale & retail | 2020 |
| Bilbutikken Froland AS | Wholesale & retail | 2017 |
| Bio Solution AS | Manufacturing | 2026 |
| Bjellebekkvegen Etappe 2 SA | Real estate | 1983 |
| Bjørumsvegen 17-19 AS | Real estate | 2022 |
| Bjørumsvegen 33 AS | Real estate | 2023 |
| Bjørumsvegen 4 AS | Real estate | 2015 |
| Bjørumsvegen 6 AS | Real estate | 2019 |
| Bjørumsvegen Eiendom AS | Real estate | 2015 |
| Bjørumsveien 31 AS | Real estate | 2022 |
| BK Utleie & Småjobber AS | Administrative & support | 2025 |
| Blakstad Anlegg AS | Administrative & support | 2022 |
| Blakstad Eiendomsutvikling AS | Real estate | 2017 |
| Blakstad Service AS | Administrative & support | 2025 |
| Blakstadheia Eiendom AS | Real estate | 1998 |
| Blakstadheia Industribygg AS | Real estate | 2007 |
| Blakstadheia Næringspark AS | Real estate | 2011 |
| Bliksåsen Panorama AS | Real estate | 2012 |
| Blomster & Gavebutikken AS | Wholesale & retail | 2023 |
| Brainwaves AS | Information & communication | 2023 |
| Breimyr Eiendom AS | Real estate | 2015 |
| Bringsverd Kran Og Transport AS | Transport & logistics | 2014 |
| Brokelandsheia Eiendom AS | Real estate | 1995 |
| Bryggereparatøren AS | Construction | 2017 |
| Buflaten Betongservice AS | Construction | 2022 |
| Butikkdrift Grimstad AS | Wholesale & retail | 2015 |
| Bygd & by Eiendom AS | Real estate | 2020 |
| Byggmesterne Nesodden AS | Construction | 2022 |
| Byglandsfjord Industribygg AS | Real estate | 1987 |
| Båtopplaget AS | Wholesale & retail | 2017 |
| Bøylestad Moen AS | Construction | 2014 |
| C-R-S AS | Professional & scientific | 2011 |
| Carl's Multiservice AS | Information & communication | 2025 |
| Cellect Holding AS | Professional & scientific | 2021 |
| Cellular Glass Nordic AS | Manufacturing | 2020 |
| Christinas Fotklinikk AS | Other services | 2023 |
| Complèbit AS | Information & communication | 2020 |
| Countryartists International AS | Professional & scientific | 2001 |
| Dalsmo Industriservice AS | Manufacturing | 2020 |
| Dans Transport AS | Transport & logistics | 2025 |
| David Bringsverd AS | Wholesale & retail | 2022 |
| Dgst AS | | 2024 |
| Dh-Utleie AS | Real estate | 2019 |
| Digg BBQ AS | Professional & scientific | 2022 |
| Dinus Media AS | Manufacturing | 2013 |
| Direct House Arendal AS | Administrative & support | 2013 |
| Direct House Engros AS | Wholesale & retail | 2020 |
| Direct House Finance AS | Wholesale & retail | 2013 |
| Direct House Media AS | Transport & logistics | 2020 |
| Doffens Salg Og Utleie AS | Real estate | 2022 |
| DR. Siri Dalsmo Berge AS | Health & social care | 2025 |
| Dronetek Sør AS | Professional & scientific | 2025 |
| Dse Eiendom AS | Real estate | 2016 |
| E. Gauslå & Sønner AS | Construction | 2015 |
| Easy Marketing AS | Wholesale & retail | 2012 |
| Effekt-Holding AS | | 2019 |
| Egte AS | Professional & scientific | 2018 |
| Eibjor AS | Real estate | 2005 |
| Eiendomservice AS | Construction | 1984 |
| Eimyr AS | Real estate | 2009 |
| Einy AS | Real estate | 2024 |
| Eios AS | Real estate | 2004 |
| Eipro AS | Professional & scientific | 2004 |
| Elektrisk Mekanikk AS | Manufacturing | 2024 |
| Enco Holding AS | Wholesale & retail | 2013 |
| Eotech AS | Information & communication | 2026 |
| Er-Bygg AS | Construction | 2018 |